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can browse throughout the gallery by clicking the navigation
arrows or any page number. If you are interested in licensing or syndicating our
intriguing perception and optical illusion contents, you
will find all usefull info here.

You
can use the image above in your non-commercial web
page for free as long as you leave the copyright and
author's info intact and link to
us.

The
AuthorsGianni A. Sarcone and Marie J. Waeber, designers and writers, are specialists
in creative learning. They create and invent educational manipulatives and thinking
games which help teach mathematics, visual and plastic arts. Their maxim is: be
curious first! (click here to
get more info about the authors).